19988437

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{1097}}^1$

素因数の和:1260

約数の個数: 16

約数和(自身を含む): 24243840

約数和(自身を除く): 4255403

約数列:

[1, 7, 19, 133, 137, 959, 1097, 2603, 7679, 18221, 20843, 145901, 150289, 1052023, 2855491, 19988437]

約数ペア:

[(1, 19988437), (7, 2855491), (19, 1052023), (133, 150289), (137, 145901), (959, 20843), (1097, 18221), (2603, 7679)]